Woodworking machine



y 19, 1932- F. SCHIMMEL WOODWORKING MACHINE Filed Dec. 14, 1929 3 Sheets-Sheet fizz/259 Jdzbymel fi flii M Q g July 19, 1932. F. SCHIMMEL WUODWORKING MACHINE 5 Sheets-Sheet 2 Filed Dec. 14, 1929 *5) v 127 50 07122 J/ z'zzamel iii/45w M V July 19, 1932. F. SCHIMMEL WOODWORKING MACHINE Filed Dec. 14, 1929 3 Sheets-Sheet 5 'lllllll'lllllllllllllllz j bmd oa fgdaj" 5??)77376] MMZM Q Patented July 19, 1932 UNITED STATES FRIDOLIN' SCHIMMEL, OF FARIBAULT, MINNESOTA WOODWORKIN G MACHINE Application filed December 14, 1929. Serial No. 414,155.

My present invention has for its object to provide a simple and highly efic ent wood working machine for general use 1n cuttlng a tenon or tongue on a piece of work and more particularly a flaring or dove-talled tenon.

To the above end, generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings, which i1- lustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings 1 Fig. 1 is a plan view of the improved wood working tool;

Fig. 2 is a view in vertical section taken on the line 22 of Fig. 1;

Fig. 3 is a rear elevation of the same;

Fig. 4 is a view partly in elevation and partly in section taken on the line 4-4 of Fi 1- Fig. 5 is a view partly in elevation and partly in section taken on the l1ne55 of Fig. 1;

Fig. 6 is a detail View principally in section taken on the line 66 of Fig. 4; and

Fig. 7 is a fragmentary view of a piece of work having a dove-tailed tenon cut thereon by the machine.

The numeral 8 indicates a frame having 9 on its top, at the back thereof, a longitudinally extended fixed base member 9. Supported on the base member 9 at the longitudinal front edge portion thereof are end and intermediate fixed brackets 10. The two end brackets 10 have intermediate forwardly projecting bearing surfaces 11 that are perpendicular to the top of the frame 8.

A work support is mounted on the frame 8 and, as shown, includes inner and outer horizontal rails 12 which extend parallel to the base 9. The inner rail 12 is mounted on the bearing surfaces 11 and the outer rail 12 i is mounted on a fixed rail 13 which rests on the top of the table 8 for lateral sliding movement toward or from the inner rail 12 and is fixed to a cross-head 14 mounted in a way 15 on the frame 8. The inner and outer rails 12 are secured to the brackets 10 and rail 13, respectively, withfreedomrfor vertical adjustment, by set-screws 16 which extend through oblique slots 17 in said rails 12. These screws 16 and slots 17 support the rails 12 for raising and lowering movements byendwise movements thereof and which move ments are parallel to the original positions of said rails. A hand-operated set-screw 18 is provided for holding the cross-head 14 in its different adjusted positions, and'hence,: the outer rail 12 different lateral distances from the inner rail 12. j

Rigidly secured to the base member 9, at the longitudinal center thereof, is a standard 19 having in its face a way 20in the form of a fiat surface with a central'vertical groove. Upper and lower spaced bearingblocks 21 and 22, respectively, are mounted for vertical sliding movement on the'way 20 and have on their backs vertical tongues 23 which slidably work in the groove of said Way and hold said blocks 21 and 22, for independent straight line raising or lowering movements. Micrometer screws 23 and 24 are provided for adjusting the blocks 21 and 22, respec-. ;z tively, and pairs of bindingscrews 25 are provided for rigidly securing said bearing blocks to the standard 19 where adjusted. These binding screws 25 extend through vertical slots in the bearing blocks 21 and 22 30 and have threaded engagement with the standard 19. Each bearing. block 21 and 22 is provided with'a pair of spaced front and rear axially aligned open half seats26. A horizontal tubular member 27 is mounted in each pair of seats 26, extends transversely of the base 9 and has in its ends anti-friction bearings 28. Upper; and lower arbors 29 extend axially through the tubular members 27 and are journaled' in their bearings28.

Secured to the front ends of the arbors 29 is a pair of radially spacedcooperating peripheral cutters 30 in the form of truncated cones. These cutters 30 diverge from the front to the rear of the machine or, in other words, toward the work support and their opposing faces are just above the plane of said support.

A. pulley 31 is keyed to the rear end of each arbor 29 and each cutter 30 is driven from an individual electric motor 32 by a belt 33 which runs over the pulley on the shaft of said motor and one of the pulleys 31. By reference to Fig. 3, it will be noted that the electric motors 32 are mounted on opposite ends of the base 9 and their belts 33 extend toward each other. The cutters 30 are designed and arranged tocut a dovetailed tenon X on a piece of work- Y, as shown in Fig. 7 by a feeding movement of said piece longitudinally on the work support.

The width of the cut made by the cutters 30 in forming the tenon X is determined by a gauge '34 in the form of a horizontal flat bar set vertically edgewise and having on its lower edge an inturned flange which rests on the brackets 10 and is rigidly secured thereto by set-screws 35. These set-screws 35- extend through slots 36 in the flange on the gauge 34 which permit lateral adjustmentof said gauge axially in respect to the cutter 30. The gauge 34 is notched at 37 to afford clearance forthe upper cutter 30.

Obviously, the work support may be raised or lowered to change the position of the work thereon in respect to the cutters 30 and said cutters may be independently radially adjusted in respect to each other and in respect to the work support for cutting tenons on materials of different thicknesses and in different relations thereto. As previously stated, the, gauge 34 may be readily adjusted to vary the width of the cut to be made by the cutters 30. The long tubular members 27 with bearings 28 in each end thereof hold the 'arbors 29 against vibration so that the cutters 30'will run true. By operating each cutter 30' from an electric motor makes a very simple and eiiicient driving means therefor. Other-cutters may be substituted for the cutters shown for cutting straight or different shaped tenons.

To terminate the tenon X short of one end of the piece of work Y in drawer construction and the like, said piece is in one end, as indicated at Z. This notch Z is formed by placing the longitudinal edge of the piece, on which the tenon is to be formed, against the gauge 34 while held oblique with one end resting on the inner rail 12 and'the'other end, or in other words, the endin which the notch is to be formed, above the upper cutter 30..

To thus hold the piece of work, as inclicated'bybroken lines in Fig. 2, against endiirst notched wise movement and proper radial distance from the axis of the upper cutter 30 to cut the notch the desired length, there is provided an adjustable gauge 38 against which the lower or outer end of the piece engages. This gauge 33 is detachably secured to the gauge 34 by a setscrew 39 which extends through a horizontal slot 40 in the gauge 38 and has threaded engagement with the gauge 34. With the piece thus held the raised end thereof is fed downward onto the upper cutter 30 which cuts the notch therein. I At the completion of this cutting of the notch Z the piece of work is brought into flat engagement with the work support and then fed endwise between the cutters 30 which cut the dovetailed tenon X therein.

What I claim is: v

1. In a machine of the class described, a base having a horizontal work face, a rotary cutter, the axis of which is parallel to the work face of the base, a work support comprising a cross-head mounted on the base for movement parallel to the axis of the cutter,

a lower horizontal rail and an upper horizontal rail set vertically edgewise with their inner edge portions in overlapping engagement, said rails extending transversely of the axis of the cutter with the lower rail slidably resting on the work face of the base and secured to the cross-head for movement therewith, cam acting devices securing the upper rail to the lower rail for raising or lowering parallel movements and operable torigidly secure the upper rail to the lower rail in different vertical adjustments, and means for securing the cross-head in respect to the base with the work support different distances from the cutter.

2. In a machine of the class described, a base having a horizontal work face, a rotary cutter, the axis of which is parallel to the work face of the base, inner and outer horizontal work supporting rails set vertically edgewise transversely of said axis, a pair of brackets fixed in respect to the base, a crosshead mounted on the base for movement parallel to the axis of the cutter, cam devices securing the inner rail to the brackets for parallel raising or lowering movements, and

other cam devices securing the outer rail to a part on the cross-head for parallel raising or lowering movements.

3. In a machine of the class described, a horizontal work support, a pair of cooperating upper and lower rotary periphery cutters, the axes of which are substantially parallel to the work support, a gauge plate for the inner longitudinal edge portion of a piece of work on the work support to guide the same transversely between the cutters to form a tenon thereon, and a stop mounted for adjustment longitudinally of the gauge plate for holding a piece of work against endwise movement radially away from the upper cutter with its outer end resting on the work support, its inner end above said upper cutter and its inner longitudinal edge against the gauge plate, prior to the forming of the tenon, for hinge-like movement about said stop first onto the upper cutter to cause the same to cut a notch in the respective corner of the piece of work and thereafter onto the work support for feeding movement away from the stop and transversely between the cutters to form said tenon, said notch terminating the tenon short of the respective end of the piece of work.

In testimony whereof I affix my signature.

FRIDOLIN SCHIMMEL. 

